Condensed Financial Information of Parent Company - Balance Sheets of Parent Company (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Total assets	$ 5,538,184	$ 5,502,219
Liabilities:
Subordinated debentures	118,377	117,808
Total liabilities	4,974,917	4,949,651
Stockholders' equity	563,267	552,568	$ 562,477	$ 531,025
Total liabilities and stockholders' equity	5,538,184	5,502,219
Hanmi Financial
Assets
Cash	17,105	7,450
Investments in consolidated subsidiaries	658,464	652,174
Other assets	7,511	12,196
Total assets	683,080	671,820
Liabilities:
Subordinated debentures	118,377	117,808
Other liabilities	1,436	1,444
Total liabilities	119,813	119,252
Stockholders' equity	563,267	552,568
Total liabilities and stockholders' equity	$ 683,080	$ 671,820